40V 6Ah Li-ion Battery with Samsung SDI for All Redback Cordless Garden Tools Sophisticated micro electric system monitor each of the batterys cell individually; 40v 6ah battery Samsung SDI, lightweight,long life, no memory effect; 40v 6ah battery fits all Redback lithium ion tools; 40v 6ah LED indicator allows the user to know capacity of the battery; Li-ion 6Ah Battery Only, Without Charger;